Eastron SDM630-Modbus V2 Manual

Product Features

• Measures kWh Kvarh, KW, Kvar, KVA, P, F, PF, Hz, dmd, V, A, etc.
• Bi-directional measurement IMP & EXP
• Two pulse outputs
• RS485 Modbus
• Din rail mounting 35mm
• 100A direct connection
• Better than Class 1 / B accuracy

Introduction

The SDM630-Modbus V2 measures and displays the characteristics of single phase two wires (1p2w), three phase three wires (3p3w,) and three phase four wires(3p4w) supplies, including voltage, frequency, current, power, active and reactive energy, imported or exported. Energy is measured in terms of kWh, kVArh. Maximum demand current can be measured over preset periods of up to 60 minutes. In order to measure energy, the unit requires voltage and current inputs in addition to the supply required to power the product.

SDM630-Modbus V2 supports Max. 100A direct connection, saves the cost and avoid the trouble to connect external CTs, giving the unit a cost-effective and easy operation. Built-in interfaces provides pulse and RS485 Modbus RTU outputs. Configuration is password protected.

Unit Characteristics

The Unit can measure and display:

• Line voltage and THD% (total harmonic distortion) of all phases
• Line Frequency
• Currents, Current demands and current THD% of all phases
• Power, maximum power demand and power factor
• Active energy imported and exported
• Reactive energy imported and exported

The unit has password-protected set-up screens for:

• Changing password
• Supply system selection 1p2w, 3p3w, 3p4w
• Demand Interval Time(DIT)
• Reset for demand measurements
• Pulse output duration

Two pulse outputs indicates real-time energy measurement. An RS485 output allows remote monitoring from another display or a computer.

RS485 Serial–Modbus RTU

This uses an RS485 serial port with Modbus RTU protocol to provide a means of remotely monitoring and controlling the Unit.
Set-up screens are provided for setting up the RS485 port.

Pulse Output

This provides two pulse outputs that clock up measured active and reactive energy. The constant of pulse output 2 for active energy is 400imp/kWh (unconfigurable), its width is fixed at 100ms. The default constant of configurable pulse output 1 is 400imp/kWh, default pulse width is 100ms. The configurable pulse output 1 can be set from the set-up menu.

Start-up Screens

1. The first screen lights up all display segments and can be used as a display check.
   
2. The second screen indicates the firmware installed in the unit and its build number.
   *The build number(1.302.2019) is for reference only. The actual build number changes according to product requirements.
   
3. The interface performs a self-test and indicates the result if the test passes.
   

After a short delay, the screen will display active energy measurements.

Measurements

The buttons operate as follows:

1. Selects the Voltage and Current display screens
   In Set-up Mode, this is the "Left" or "Back" button.
   
2. Select the Frequency and Power factor display screens
   In Set-up Mode, this is the "Up" button
   
3. Select the Power display screens
   In Set-up Mode, this is the "Down" button
   
4. Select the Energy display screens
   In Set-up mode, this is the "Enter" or "Right" button
   

Voltage and Current

Each successive pressing of the button selects a new range:

1. 1. Phase to neutral voltages (3p4w)
      
   2. Phase to neutral voltages (3p3w)
      
2. Current on each phase
   
3. 1. Phase to neutral voltage THD%(3p4w)
      
   2. Phase to neutral voltage THD% (3p3w)
      
4. Current THD% for each phase
   

Frequency and Power Factor and Demand

Each successive pressing of the button selects a new range:

1. Frequency and Power Factor (total)
   
2. Power Factor of each phase
   
3. Maximum Power Demand
   
4. Maximum Current Demand
   

Power

Each successive pressing of the button select a new range:

1. Instantaneous Active Power in kW
   
2. Instantaneous Reactive Power in kVAr
   
3. Instantaneous Volt-amps in KVA
   
4. Total kW, kVAr, kVA
   

Energy Measurements

Each successive pressing of the button selects a new range:

1. 1. Imported active energy in kWh
      
   2. Exported active energy in kWh
      
2. 1. Imported reactive energy in kVArh
      
   2. Exported reactive energy in kVArh
      
3. 1. Total active energy in kWh
      
   2. Total reactive energy in kVArh
      

Set-up

To enter set-up mode, pressing the button for 3 seconds, until the password screen appears.

Setting up is password-protected so you must enter the correct password (default '1000') before processing.
If an incorrect password is entered, the display will show: PASS Err

To exit setting-up mode, press repeatedly until the measurement screen is restored.

Set-up Entry Methods

Some menu items, such as password, require a four-digit number entry while others, such as supply system, require selection from a number of menu options.

Menu Option Selection

1. Use the and buttons to select the required item from the menu. Selection does not roll over between bottom and top of list.

2. Press to confirm your selection.
3. If an item flashes, then it can be adjusted by the and buttons. If not, there maybe a further layer.
4. Having selected an option from the current layer, press to confirm your selection.
5. Having completed a parameter setting, press to return to a higher menu level. You will be able to use the and buttons for further menu selection.
6. On completion of all set-up, press repeatedly until the measurement screen is restored.

Number Entry Procedure

When setting up the unit, some screens require the entering of a number. In particular, on entry to the setting up section, a password must be entered. Digits are set individually, from left to right. The procedure is as follows:

1. The current digit to be set flashes and is set using the and buttons.
2. Press to confirm each digit setting.
3. After setting the last digit, press to exit the number setting routine.

Change Password

1. Use the and to choose the change password option.
   
2. 1. Press the to enter the change password routine. The new password screen will appear with the first digit flashing.
      
   2. Use and to set the first digit and press to confirm your selection. The next digit will flash.
      
   3. Repeat the procedure for the remaining three digits
      
   4. After setting the last digit, press the button for more than 3s to confirm the final setting.
      

Press to exit the number setting routine and return to the Set-up menu.

DIT Demand Integration Time

This sets the period in minutes over which the current and power readings are integrated for maximum demand measurement. The options are: 0, 5, 8, 10, 15, 20, 30, 60 minutes

1. From the set-up menu, use and buttons to select the DIT option. The screen will show the currently selected integration time.
   
2. 1. Press to enter the selection routine.
      The current time interval will flash.
      
   2. Use and buttons to select the time required.
      
   3. Press to confirm the selection.
      Press to exit the DIT selection routine and return to the menu.
      

Backlit Set-up

1. The backlit lasting time is settable.
   Default lasting time is 60minutes.
   For example, if it's set as 5, the backlit will be off in 5minutes from the last time operation on the meter.
   
2. Press to enter the selection routine. The current time interval will flash
   The options can be: 0 (always on), 5, 10, 30, 60, 120 minutes
   

Use and buttons to select the time interval. Press to confirm the set-up.

Supply System

Use this section to set the type of electrical system.

1. From the Set-up menu, use and buttons to select the System option. The screen will show the currently selected system type.
   
2. 1. Press to enter the selection routine. The current selection will flash
      
   2. Use and buttons to select the required system option: 1P2(W),3P3(W),3P4(W)
      
   3. Press to confirm the selection. SET indicator will appear.
      

Press to exit the system selection routine and return to the menu. You will be returned to the main Set-up Menu.

Pulse Output

This option allows you to configure the pulse output 1. The output can be set to provide a pulse for a defined amount of energy active or reactive.
Use this section to set up the pulse output for:
Total kWh/ Total kVArh
Import kWh/Export kWh
Import KVArh/Export KVArh

1. From the Set-up menu, use and buttons to select the Pulse output option.
   
2. 1. Press to enter the selection routine. The unit symbol will flash.
      
   2. Use and buttons to choose the selection.
      

Press to confirm the setting and press to return to the main set up menu.

Pulse Rate

Use this to set the energy represented by each pulse. Rate can be set to 1 pulse per dFt/0.01/0.1/1/10/100kWh/kVArh.

(It shows 1 pulse = 10kWh/kVArh)

1. From the Set-up menu, use and buttons to select the Pulse Rate option
   .
2. Press to enter the selection routine. The current setting will flash. Note: When it's dFt, it means 2.5Wh/VArh
   

Use and buttons to choose pulse rate. On completion of the entry procedure, press to confirm the setting and press to return to the main set up menu.

Pulse Duration

The energy monitored can be active or reactive and the pulse width can be selected as 200, 100(default) or 60ms.

(It shows pulse width of 200ms)

1. From the Set-up menu, use and buttons to select the Pulse width option.
   
2. Press to enter the selection routine. The current setting will flash.
   

Use and buttons to choose pulse width. On Completion of the entry procedure, press to confirm the setting and press to return to the main set -up menu.

Communication

There is a RS485 port can be used for communication using Modbus RTU protocol. For Modbus RTU, parameters are selected from Front panel.

RS485 Address

(The range is from 001 to 247)

1. From the Set-up menu, use and buttons to select the Address ID.
   
2. 1. Press button to enter the selection routine. The current setting will be flashing.
      
   2. Use and buttons to choose Modbus Address (001 to 247)
      

On completion of the entry procedure, press button to confirm the setting and press button to return the main set-up menu.

Baud Rate

1. From the Set-up menu, use and buttons to select the Baud Rate option.
   
2. 1. Press to enter the selection routine. The current setting will flash.
      
   2. Use and buttons to choose Baud rate 2.4k. 4.8k, 9.6k, 19.2k, 38.4k
      

On completion of the entry procedure, press to confirm the setting and press to return to the main set-up menu.

Parity

1. From the Set-up menu, use and buttons to select the Parity option.
   
2. 1. Press to enter the selection routine. The current setting will flash.
      
   2. Use and buttons to choose Parity (EVEN / ODD / NONE)
      

On Completion of the entry procedure, press to confirm the setting and press to return to the main set-up menu.

Stop Bits

1. From the Set-up menu, use and buttons to select the Stop Bit option.
   
2. 1. Press to enter the selection routine. The current setting will flash.
      
   2. Use and buttons to choose Stop Bit (2 or 1)
      

On completion of the entry procedure, press to confirm the setting and press to return to the main set up menu.

Note: Default is 1, and only when the parity is NONE that the stop bit can be changed to 2.

CLR

The meter provides a function to reset the maximum demand value of current and power.

1. From the Set-up menu, use and buttons to select the reset option.
   
2. Press to enter the selection routine. The MD will flash.
   

Press to confirm the setting and press to return to the main set up menu.

Specifications

Measured Parameters

The unit can monitor and display the following parameters of a single phase two wire(1p2w), three phase three wire(3p3w) or four phase four wire(3p4w) supply.

Voltage and Current

Phase to neutral voltages 100 to 276V a.c. (not for 3p3w supplies)

Voltages between phases 173 to 480V a.c. (3p supplies only)

Percentage total voltage harmonic distortion (THD%) for each phase to N ( not for 3p3w supplies)

Percentage voltage THD% between phases (three phase supplies only)

Current THD% for each phase

Power Factor and Frequency and Max. Demand

Frequency in Hz Instantaneous power:

Power 0 to 99999 W

Reactive Power 0 to 99999 VAr

Volt-amps 0 to 99999 VA

Maximum demanded power since last Demand reset Power factor

Maximum neutral demand current, since the last Demand reset (for 3p4w supply only)

Energy Measurements

Imported active energy	to 999999.99 kWh
Exported active energy	to 999999.99 kWh
Imported reactive energy	to 999999.99 kVArh
Exported reactive energy	to 999999.99 kVArh
Total active energy	to 999999.99 kWh
Total reactive energy	to 999999.99 kVArh

Measured Inputs

Voltage inputs through 4-way fixed connector with 25mm ² stranded wire capacity. single phase two wire(1p2w), three phase three wire(3p3w) or four phase four wire(3p4w) unbalanced. Line frequency measured from L1 voltage or L3 voltage.

Accuracy

Voltage	0·5% of range maximum
Current	0·5% of nominal
Frequency	0·2% of mid-frequency
Power factor	1% of unity (0.01)
Active power (W)	±1% of range maximum
Reactive power (VAr)	±1% of range maximum
Apparent power (VA)	±1% of range maximum
Active energy (Wh)	Class 1 IEC 62053-21 Class B EN50470-1/3
Reactive energy (VArh)	Class 2 IEC 62053-23
Response time to step input	1s, typical, to >99% of final reading, at 50 Hz.

Interfaces for External Monitoring

Three interfaces are provided:

• RS485 communication channel that via protocol remotely.
• Pulse output (Pulse 1) indicating real-time measured energy.(configurable)
• an Pulse output (Pulse 2) 400imp/kWh(non-configurable)

The Modbus configuration (Baud rate etc.) and the pulse output assignments (kW/kVArh, import/export etc.) are configured through the Set-up screens.

Pulse Output

The unit provides two pulse outputs. Both pulse outputs are passive type.
Pulse output 1 is configurable. The pulse output can be set to generate pulses to represent total / import/export kWh or kVarh.

The pulse constant can be set to generate 1 pulse per:
dFt = 2.5 Wh/VArh 0.01 = 10 Wh/VArh
0.1 = 100 Wh/VArh
1 = 1 kWh/kVArh
10 = 10 kWh/kVArh
100 = 100 kWh/kVArh
Pulse width: 200/100/60ms
Pulse output 2 is non-configurable. It is fixed up with active kWh. The constant is 400imp/kWh.

RS485 Output for Modbus RTU

For Modbus RTU, the following RS485 communication parameters can be configured from the Set-up menu:

Baud rate 2400, 4800, 9600, 19200, 38400
Parity none (default)/odd/even
Stop bits 1 or 2
RS485 network address nnn – 3-digit number, 001 to 247
Modbus™ Word order Hi/Lo byte order is set automatically to normal or reverse. It cannot be configured from the set-up menu.

Reference Conditions of Influence Quantities

Influence Quantities are variables that affect measurement errors to a minor degree. Accuracy is verified under nominal value (within the specified tolerance) of these conditions.

Ambient temperature	23°C ±1°C
Input frequency	50Hz(MID) 50 or 60Hz ±2%(non-MID)
Input waveform	Sinusoidal (distortion factor < 0·005)
Magnetic field of external origin	Terrestrial flux

Environment

Operating temperature	-25°C to +55°C*/ -40°C to +70°C* (optional)
Storage temperature	-40°C to +70°C*
Relative humidity	0 to 90%, non-condensing
Altitude	Up to 2000m
Warm up time	5S
Vibration	10Hz to 50Hz, IEC 60068-2-6, 2g
Shock	30g in 3 planes

* Maximum operating and storage temperatures are in the context of typical daily and seasonal variation.

Dimensions

Wiring diagram

• Three Phase Three Wires:
  
• Three Phase Four Wires:
  
• Single Phase two Wires:
  

Contact Information

If you have any question, please feel free to contact our sales team.

Tel: 0086-573-83698881
Fax: 0086-573-83698883

email: sales@eastrongroup.com

Web: www.eastron.com.cn

Documents / Resources

References

• Company Overview - Zhejiang Eastron Electronic Co., Ltd.

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